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-rw-r--r--extras/mini-os/minios.mk2
1 files changed, 1 insertions, 1 deletions
diff --git a/extras/mini-os/minios.mk b/extras/mini-os/minios.mk
index 5f81bb7d77..fa6f6bd0c9 100644
--- a/extras/mini-os/minios.mk
+++ b/extras/mini-os/minios.mk
@@ -6,7 +6,7 @@ debug = y
# Define some default flags.
# NB. '-Wcast-qual' is nasty, so I omitted it.
-DEF_CFLAGS := -fno-builtin -Wall -Werror -Wredundant-decls -Wno-format
+DEF_CFLAGS += -fno-builtin -Wall -Werror -Wredundant-decls -Wno-format
DEF_CFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
DEF_CFLAGS += -Wstrict-prototypes -Wnested-externs -Wpointer-arith -Winline
DEF_CFLAGS += -D__XEN_INTERFACE_VERSION__=$(XEN_INTERFACE_VERSION)